[Doodlebug]

This might be a crazy suggestion, but I would also try this if it were me.

If you have another dog or a friend or family with a dog that is close to your baby I would take them out on a leash and tell them to "find Delilah". Maybe let them sniff something of hers.

When I tell my babies to "find" the other dog they will go right to them even if we are in a store with a lot of aisles. They ALWAYS know how to find the other one. I have told each of my babies to "find daddy" when he is on a car dealership lot and I put them down and they will RUN straight to him no matter how far away he is. I don't know how they know, but they do. This might be a long shot but anything is worth a try. I would definitely try it if it were me.